From owner-freebsd-net@FreeBSD.ORG  Tue Apr 19 13:55:34 2011
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 02E0E106566B;
	Tue, 19 Apr 2011 13:55:34 +0000 (UTC)
	(envelope-from ndenev@gmail.com)
Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com
	[209.85.161.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 53BB88FC13;
	Tue, 19 Apr 2011 13:55:32 +0000 (UTC)
Received: by fxm11 with SMTP id 11so4611488fxm.13
	for <multiple recipients>; Tue, 19 Apr 2011 06:55:32 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:subject:mime-version:content-type:from
	:in-reply-to:date:cc:message-id:references:to:x-mailer;
	bh=hy9KP/7D/e0ejiQ7Xct0MSeAVtQ8y4i9sypC7YWHqoA=;
	b=yA8sloes2vb6ABfOSXPEZGZyvKHaFwaZJuH3bo6VH71oe6olmVZPlhciBn+fl0tvIn
	S1I+Sjvku24WZxlmr/vpRRQnAK/OosygdUvQOdcsYdQWunwPPuPWxF5WmPzs1y/kRZdX
	SbUtpPPbCjTfEODsYHnbhryErtLccS+sDBCR0=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=subject:mime-version:content-type:from:in-reply-to:date:cc
	:message-id:references:to:x-mailer;
	b=LJ3lRfDVustyr0Q57jlXcOeFA7a+gwte0A5VEC8Ky1ILO0lB9r/4qDX2qWlDOwhlzJ
	PcLxVBNPbUQXi195g9D5DXhsdrPQ+imw6CsZOk/zbj94xMV/l0IVr7wTGl/zct4eTpCq
	li4zgRay15CJs3SkzRV6V/HWBEjZP0NuFzzSg=
Received: by 10.223.155.140 with SMTP id s12mr874619faw.63.1303221331897;
	Tue, 19 Apr 2011 06:55:31 -0700 (PDT)
Received: from ndenevsa.sf.moneybookers.net (g1.moneybookers.com
	[217.18.249.148])
	by mx.google.com with ESMTPS id b18sm1942923fak.8.2011.04.19.06.55.28
	(version=TLSv1/SSLv3 cipher=OTHER);
	Tue, 19 Apr 2011 06:55:29 -0700 (PDT)
Mime-Version: 1.0 (Apple Message framework v1084)
From: Nikolay Denev <ndenev@gmail.com>
In-Reply-To: <BANLkTim6HMGibDB4ucs+tEfqv-LBnF4O-w@mail.gmail.com>
Date: Tue, 19 Apr 2011 16:55:27 +0300
Message-Id: <E4328014-47D0-4EFC-8C70-5D28823179C8@gmail.com>
References: <alpine.LRH.2.00.1104050303140.2152@filebunker.xip.at>
	<alpine.LRH.2.00.1104061426350.2152@filebunker.xip.at>
	<alpine.LRH.2.00.1104180051450.8693@filebunker.xip.at>
	<BANLkTik39HvVire6Hzi9U6J2BwKV7apCCg@mail.gmail.com>
	<alpine.LRH.2.00.1104181852420.8693@filebunker.xip.at>
	<BANLkTim0hoHDnrweYz+vc7zOvMubddJmGg@mail.gmail.com>
	<BANLkTim6HMGibDB4ucs+tEfqv-LBnF4O-w@mail.gmail.com>
To: K. Macy <kmacy@freebsd.org>
X-Mailer: Apple Mail (2.1084)
Content-Type: text/plain;
	charset=us-ascii
Content-Transfer-Encoding: quoted-printable
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: freebsd-net@freebsd.org, Ingo Flaschberger <if@freebsd.org>
Subject: Re: Routing enhancement - reduce routing table locking
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Apr 2011 13:55:34 -0000


On Apr 18, 2011, at 8:59 PM, K. Macy wrote:
> It occurred to me that I should add a couple of qualifications to the
> previous statements. 1.6Mpps is line rate for GigE and I only know of
> it to be achievable by igb hardware. The most I've seen em hardware
> achieve is 1.1Mpps. Furthermore, in order to achieve that you would
> have to enable IFNET_MULTIQUEUE in the driver, because by default the
> driver uses the traditional (slow) IFQ as opposed overloading
> if_transmit and doing its own queueing when needed. Support for
> efficient multi-queue software queueing is provided by buf_ring, a
> lock-free multi-producer ring buffer written just for this purpose.
>=20
> Thus, the fairly low transmit rate may be attributable to driver =
locking.
>=20
> Cheers


Hi,

I'm not able to find IFNET_MULTIQUEUE in a recent 8.2-STABLE, is this =
something
present only in HEAD?


Regards,
Nikolay=